Nalco Chemical Company

Brian F Post

William F McCoy

Claudia C Pierce

Scott R Harder

E H Zeiher

Timothy L Chaffin

An in-line apparatus for monitoring membrane deposition is provided having an exterior body that defines an interior compartment for receiving a fluid stream. A coupon rack is positioned in the interior compartment and suspends at least one coupon holder. The coupon holder holds at least one membrane for collection of deposition present within a filtration system. The apparatus allows examination of membrane surface deposition without sacrificing a membrane element and also provides timely diagnostic information on a filtration system. The present invention also provides a method of monitoring membrane deposition as well as a filtration system incorporating an in-line apparatus for monitoring membrane deposition.

Apparatus and method for the monitoring of membrane deposition

In a diagnostic method wherein steam condensate is evaluated, the proportion of condensate water from one steam source, versus other steam sources, is determined by adding at an addition point a tracer that is selectively carried over into the steam.

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Lombard, IL, United States of America

Brian F Post